The British pound strengthened on Wednesday, last trading at $1.3559, approaching its highest level since August 28. So far this year, sterling has gained roughly 0.5% against the U.S. dollar, making it one of the better-performing major currencies. Even as Bank of England Governor Andrew Bailey downplayed the certainty of interest rate increases the previous day, markets continue to bet on future BoE tightening amid surging energy prices and a rebound in inflation.

Speaking at a parliamentary hearing on Tuesday, Bailey explicitly rejected the notion of a predetermined tightening path, saying he wanted to dispel the idea that the central bank had "a secret plan and knows exactly where it's going." Money markets are currently pricing in at least two rate hikes, with odds of roughly 40% for an additional increase before March next year — a notable divergence between market pricing and the central bank's messaging.

Meanwhile, ongoing Middle East conflicts continue to push energy prices higher, with Brent crude breaking through the $100-per-barrel mark and European natural gas prices roughly twice their pre-conflict levels. The UK's July CPI rose to 2.9% year-on-year, up from 2.6% in June, and the energy shock is once again becoming a key variable influencing UK interest rates and the trajectory of the pound.

Energy and fiscal risks intertwine, clouding sterling's outlook

According to ING data, since the Middle East conflict erupted, every $10 rise in Brent crude has lifted UK two-year rates by an average of roughly 15 basis points — higher than the 11 basis points seen in the eurozone and 8 basis points in the U.S. This highlights that UK rates are more sensitive to energy price shocks.

However, ING strategist Michiel Tukker believes market pricing for BoE rate hikes may already be too aggressive. Oil price trajectories remain highly uncertain, and with the UK autumn budget statement approaching, current rate expectations face a meaningful risk of adjustment. Money markets are currently not anticipating any action from the BoE at next week's meeting.

Surging energy prices are complicating the BoE's policy calculus. Continued oil gains could further stoke inflation and reinforce tightening expectations, but if the energy shock were to ease, current rate pricing could just as easily retreat.

Additionally, the autumn budget represents another major swing factor for sterling, as fiscal policy could further reshape market views on the inflation and rate path. Tukker previously noted that with oil prices potentially testing $100 again, no clear trading opportunity has emerged at this stage.

By comparison, market pricing for simultaneous Fed rate hikes is far more tempered, and the interest rate differential between the UK and U.S. continues to provide some support for the pound. Looking ahead, oil prices, inflation, and fiscal policy will remain the decisive factors driving sterling's direction.